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- Replaces rear derailleur with chain tensioner for a simple, secure drivetrain
- Expert version elevates the Colab chain tensioner for the most extreme use and easy adjustment
- Adding 15mm of adjustability for the chainline by loosening one bolt, the Expert version helps riders achieve perfect chain alignment without the removal of the tensioner
- Adjustable limit stopper as well as a pinch bolt on the mounting bracket and higher spring tension provide more chain retention and also maintains position when the rear wheel is removed
- Compatible with 9/10/11-speed chains, 13-17 tooth cogs
- Aluminum construction, made in Germany